US3290919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure hydraulic forming press
Assignee: Milacron Inc
•
Filing: 1963-12-18
•
Granted: 1966-12-13
•
Expires: 1983-12-18
Abstract
No abstract record available.
Inventors
- 👤 Frank J Malinak
- 👤 Charles L Mitchell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:06
CPC Classifications
B; B30; B30B; B30B15/00; B30B15/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
IN A HYDRAULIC PRESS (A) A BED, (B) A RAM, (C) A PAIR OF CYLINDERS IN END-TO-END RELATION INSIDE THE BED, (D) AN ACTUATOR CONNECTED TO THE RAM, SAID ACTUATOR DEFINING TWO PISTONS RECEIVED RESPECTIVELY IN SAID CYLINDERS AND HAVING DIFFERENT EFFECTIVE AREAS, (E) A PRESSURE LINE, (F) A PAIR OF CONSTANT VOLUME PUMPS CONNECTED TO THE PRESSURE LINE, SAID PAIR OF CONSISTING OF A LOW PRESSURE PUMP AND A HIGH PRESSURE PUMP, (G) MEANS RESPONSIVE TO PRESSURE IN THE PRESSURE LINE TO DISCONNECT THE LOW PRESSURE PUMP FROM THE PRESSURE LINE AT A PREDETERMINED PRESSURE, (H) MEANS SELECTIVELY TO CONNECT ONE OR THE OTHER OR BOTH OF SAID CYLINDERS TO THE PRESSURE LINE, (I) AND MEANS SEQUENTIALLY TO CHANGE THE CYLINDERS CONNECTED TO THE PRESSURE LINE IN RESPONSE TO THE MAGNITUDE OF THE PRESSURE IN THE PRESSURE LINE.
Claim 2
Dependent Claim
139 words
IN A HYDRAULIC PRESS (A) A BED, (B) A RAM, (C) A PAIR OF CYLINDERS IN END-TO-END RELATION INSIDE THE BED, (D) AN ACTUATOR CONNECTED TO THE RAM, SAID ACTUATOR DEFINING TWO PISTONS RECEIVED RESPECTIVELY IN SAID CYLINDERS AND HAVING DIFFERENT EFFECTIVE AREAS, (E) A PRESSURE LINE, (F) A PAIR OF CONSTANT VOLUME PUMPS CONNECTED TO THE PRESSURE LINE, SAID PAIR OF CONSISTING OF A LOW PRESSURE PUMP AND A HIGH PRESSURE PUMP, (G) MEANS RESPONSIVE TO PRESSURE IN THE PRESSURE LINE TO DISCONNECT THE LOW PRESSURE PUMP FROM THE PRESSURE LINE AT A PREDETERMINED PRESSURE, (H) MEANS SELECTIVELY TO CONNECT ONE OR THE OTHER OR BOTH OF SAID CYLINDERS TO THE PRESSURE LINE, (I) AND MEANS SEQUENTIALLY TO CHANGE THE CYLINDERS CONNECTED TO THE PRESSURE LINE IN RESPONSE TO THE MAGNITUDE OF THE PRESSURE IN THE PRESSURE LINE.
References Cited (Backward Citations)
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Cited
US1982711A
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US2220798A
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US2313623A
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US2938451A
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US2937606A
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US3168033A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |